Workflow Builder is a production-ready React SDK for building and embedding visual workflow editors into software products. Built on React Flow, it extends it with a complete editor layer: canvas, node library, schema-driven properties panel, plugin architecture, and JSON serialization — so you don't have to build this layer from scratch. WB focuses exclusively on the frontend editor layer. The output is a workflow definition in JSON that your backend processes however you need. Execution and business logic remain fully under your control. Community Edition is open-source (Apache 2.0). Enterprise Edition (one-time €6,990) includes advanced features, Figma Kit, source code access, and dedicated support. Key capabilities: undo/redo, smart edge routing, ELK auto-layout, copy-paste, 500+ node performance, and full white-label customization via design tokens. Built by Synergy Codes — 15+ years of diagramming expertise, 170+ custom workflow tools delivered.